Miner&#39;s lamp.



J. BE-RTHA. MINER'S LAMP. APPLICATION FILED Nov.'25, 1911."

Patented-Mar. 26, 19.12.

5 n l l g i l. l

INVENTOR ATTORNEYS To all whom t may concern mura entras TULIU'S'BERTHA, OF TYR/E, PENSYLVANIA.

MINER S LAMP.

vBe it known that I, JULUs BERTHA, a' citizen of .the United States ofAmerica, residiner at T vre, in the county of Allegheny and State ofPennsylvania, h'ave invented certain new and useful lmprover'ents inMiners Lamps, of which the following is a speciitication, referencebeing had therein to the accompanying drawing. v ,l

'lriilis invention relates to miners lamps;

i andf'tlie primary objectof my invention .is y to provide an acetylenegas lamp that will produce a bright flame or llight and facilitateIt-hevwork of miners.

Another object of thisv invention is to provide an acetylene gas lampthat can be safely worn upon a. cap and easily maintained in an operablecondition.

Ay further object of the invention is to provide a miners acetylene graslamp that is inexpensive to manufacture durable and highly etlicient forthe purpo'es for which it is intended. I j

With the above and other objects in view the invention resides inthenovel construction, combination and arrangement of parts to behereinafter Specifically described and then claimed.

Reference will now be had to the drawing. wherein there are illustratedthe preferred embodiments of the invention, but it is to `be understoodthat the structural elements are susceptible to such variations as fallWithin the scope of the appended claims. In 'the drawings Figure 1 1s afront elevation of the lamp. Fig. Qyiis a vertical Icross sectional Viewof the same. Fig. 3 is a Afront elevation ot the lamp.5 part-ly brokenaway and partly in longitudinal section. Fig. 4t is' a horizontalsectional view of the lamp,and'Fig. 5 is asimilar View ofa modified formof lamp. i 1

A lamp vin accordance with this invention comprises a water receptacle,carbid receptacles7 a controlling mechanism, a burner and Iotherappurtenances of a lamp.

The water receptacle comprises a conicalshaped shell 1 having` the topthereof provided with an opening 2 normally closed by a hinged lid orstopper 3.' The lower edges of the shell l terminate in vertical walls 4and secured to the lower edgesof said walls is an oval bottom plate 5. eArranged within the shell 1 .is a' diaphragm or. hcrizontal partition 6providing a' compartment 7 for the I controlling mechanism of the lamp;`The Specification of Letters Patent.

l application mea november 25, 1911.

patented Mar. 26, 1912. serial No. 662,321. l I

corresponding` in depth to the walls t and Y the space above thepartit-ion 6 provides a water reservoir 9. Y .v

Soldered or otherwise connected tothe bottom plate 5 are caps 10 thatare interiorly screw threaded, as at 11 to receive the upper exteriorlyscrew threaded ends of cupshaped or cylindrical carbid receptacles 12adapted to contain calcium carbid. Arranged in each receptacle is acircular 'detachable bottom plate 13l having a central vertical tube 14provided with perfor ations 15. The upper end of the tube terminates atan opening 16 in a perforated cup or screen.; 17 suitably connectedtothe inner sides of the caps 10. The perforated cups are of a lessdiameter than the carbid receptacles 12.

The controlling mechanism comprises pipes 18 that extend downwardlythrough the bottom plate 5` and the caps '10 into the upper ends of thetubes 14. The'upper ends of the pipes are in communication with tubularvalve bodies 19 that extend through the walls 8` and it at the frontside ot' the lamp. The valve bodies 19 are connected by a longitudinalpipe 2O and said pipe. intermediate the ends thereof, is connected to awater pipe 21 that has the end thereof extending into an opening 22provided therefor' in the partition 6. 'In the valve kbodies 19 areslidable valve stems 23 which in a closed posif closed by a mica iiapvalve 26 riveted or,

otherwise secured intermediate its ends` as at 2'? to the bottom plate5.

The burner comprises a tube QS that extends through-the walls ,8 and 4linto the compartment 7. The outer end of the tube 28 supports a disk orcircular reflector Q9.

Suitably connected to the yrear side of the llamp at a pointdiametrically opposite the burner is a hoolr 30 by which thelamp can bedetachably connected to a cap.

' It is a well known fact that acetylene gas used in lamps of this kindis generated by water 'dripping onto calcium carbid in properlycontrolled quantities. Assuming v that the reservoir 9 contains waterand the receptacles l2 calcium carbid, it is only necessary for theminer to regulate the valve stems Q3 to admit the proper quantity ofwater to the pipes 1S. As the water passes into the tubes 14: andthrough the perforations l5 it contacts with the calcium carbid wherebyacetylene gas' 1s generated. The gas passes through the perforated cups17 and a t'ter a sutiicient quantity of gas has been gene ated itescapes through the openings 25 into the compartment 7 and then to theburner tube 28, at the outer end of which it can be ignited.

The perforated cups 17 prevent the openings Q5 from being clogged by thecarbid mixture and the pert'orations l5 insure the equal distribution ofwater in the carbid chamber.

I attach considerable importance to using vseparate carbid containers orreceptacles in connection with the lamp. In the present type otlacetylene gas lamp there is a single container' for carbid andconsiderable trouble is now experienced, particularly among minersfonaccount of obtaining a poor light near` the end ot the supply of carbid.In other words, the chemical actionV is not sutlicient near the end ofthe supply of' calcium carbid to generate gas and produce a brightlight. Many miners will not use the acetylene lamp on thisaccount, andthe majority that do use the lamp are provided with an oil lamp thatthey use while recharging the single carbid container or receptacle. Itis the present practice when the light becomes' poor to immediately recharge the lamp and considerable calcium carbid is wasted,` as the minergenerally dumps the solution on to the floor and re` charges with afresh supply of calcium carbid. By providing two cooperating carbidcontainers, I eliminate the 4waste of carbidr and always provide abright light that will facilitate theV work of a miner. The miner, byregulating the valves, can utilize the gas from one of the containersuntil the light becomes poor, then the other container can be broughtinto action and the gas utilized to maintain a strong and powerfullight. It is during this period of use that t-he container first usedwill be completely exhausted and then the container can be rechargedwhile the other container is furnishing the light. It will therefore benoted that the lamp can be continuously used without any interruptionand without resorting to the use of an oil lamp to furnish light whilethe, I

acetylene lamp is being recharged.V

In Fig. 5 of the drawing there 1s 1llustrated a simplified form of lamp,wherein the Valve bodies 3l are in direct communica# tion with thereservoir 9 and in communication with down pipes 32 that extend into thetubes of the carbid receptacles. The

communication between the valve bodies 3l liquid reservoir, carbidreceptacles, a gas collecting chamber interposed between said reservoirand said receptacles and communieating with these lattery detachableperfo rated tubes arranged in said receptacles, valve bodies incommunication with said tubes, a water pipe interconnnunicating Vbetweensaid reservoir and carbid receptacles, ai"

burner tube at the front side of said lamp and communicating with saidgas collectin chamber, and means-at the rear side of sai lamp tofacilitate attaching a lamp to a miners cap'. l

2.. A miner`s acetylene gas-lamp compris ing a water reservoir havingthe base thereof provided with a controlling compartment, carbidreceptacles detachably connected to the base of said reservoir and incommunication with said controlling compartment, detachable perforatedtubes arranged within the receptacles, perforated cups arranged within`said receptacles for preventing the communication between saidcompartment and said receptacles from being clogged, water pipeskintercommunicating between said reservoir and said tubes, a, burner incommunication with said controlling compartment and adapted to receivetherefrom, and means for controlling the` supply of water from saidreservoir` tosaid perforated tubes.

In testimonywhereot I ailix my signa` ture in the presence of twowitnesses.

JULIUS BERTHA. Witnesses MAX H. Snonovrrz, CHRISTINA T. Hoon.

